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#1
07-14-2015, 01:51 AM
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I use a gravity feed from a bucket. System Cost 15.00 and has never failed
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150 gallon reef mostly softies/lps. 50 gal sump with bubble magnus skimmer/ Led fuge light/refugium/ 1200 return and tunze powerheads. Dual pharoah main tank led.4 pump dosser. 550 gallon stingray tank water drip system 150 bowfront. 75 turtle tank, many others 
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#3
07-14-2015, 04:21 AM
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I have used 2 Kent Float Valves for 14 years with no problems.
I uses 1 Kent Float Valve from my RODI to a 45 gal drum and a second Fent Float Valve from the 45 gal drum to my sump. The water storage tank can be any size. I use a 45 gal drum, Tom R
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#4
07-14-2015, 03:55 PM
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using the Tunzie 3155 ato system, so far it works very well. I like the gravity system best but my wife has a problem with a five gallon pail on top of a 6' step ladder in the living room. LOL!
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Hey! I never "LEFT" the hobby, just doing fresh water now. Which is still listed as part of Canreef if I'm not mistaken. 
Last edited by The Guy; 07-14-2015 at 04:00 PM.
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#5
07-14-2015, 04:14 PM
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Ugly but fairly simple. Many, many years of trouble free operation. A variation of the mechanical float valve, gravity feed method. I don't have sump or room to mount a container above my display, so use a glass carboy pressurized by an air pump on a timer to feed a mechanical float valve in the display. I shortened the valve by a couple of chambers to reduce the footprint in the tank. I think after 5 or 6 years, I may finally need to replace the float valve. The rubber seal that closes the opening in the feed line when the valve is up has finally hardened to the point where it no longer provides a complete seal. Should be about $10 at the local hardware store.
What I find good about this set up is that everything happens rather slowly & even if something goes wrong, there's generally no disaster in the form of a flood. The fresh water is limited to the 7 gallons in the carboy and the air pump keeps just enough air pressure in there to feed the tank with a trickle when the level drops to open the mechanical valve. It gives me about 7 days of ATO.  
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Mike 77g sumpless SW DIY 10 watt multi-chip LED build  http://www.canreef.com/vbulletin/showthread.php?t=82206
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#6
07-16-2015, 12:40 PM
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In my old setup I had a double setup. Basically, the first sensor is for control to start and stop the auto top off. That one is fed through another auto top off which is just a secondary shut off. Both systems have to be satisfied to feed water. If the first one fails, the backup will de-energize the auto topoff pump.
I did this after flooding my tank and the salinity dropped to 1.010!
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#7
07-16-2015, 02:16 PM
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What I use is a solenoid after my ro/di storage tank on a timer,every 2 hours on for 1 minute and as a back-up I use a big float valve in my sump, if the water rise to much it will stop from overflowing. Having it for 2 years and never had a problem..100% safe. Cost me 50$ all together
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